GB/T 4324.24-1984 Methods of chemical analysis of tungsten--The beryllium as carrier precipitation agent-molybdenum blue photometric method for the determination of phosphorus content
This standard is applicable to the determination of phosphorus content in tungsten powder, tungsten bar, tungsten trioxide, tungstic acid and ammonium paratungstate. The determination range is 0.0002~0.018%.
GB/T 4324.24-1984 history
2012GB/T 4324.24-2012 Methods for chemical analysis of tungsten.Part 24:Determination of phosphorus content.Molybdemum blue photometry
1984GB/T 4324.24-1984 Methods of chemical analysis of tungsten--The beryllium as carrier precipitation agent-molybdenum blue photometric method for the determination of phosphorus content